667222278413 has 2 divisors, whose sum is σ = 667222278414. Its totient is φ = 667222278412.

The previous prime is 667222278407. The next prime is 667222278493. The reversal of 667222278413 is 314872222766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666283652644 + 938625769 = 816262^2 + 30637^2 .

It is a cyclic number.

It is not a de Polignac number, because 667222278413 - 2⁴ = 667222278397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667222278493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333611139206 + 333611139207.

It is an arithmetic number, because the mean of its divisors is an integer number (333611139207).

Almost surely, 2^667222278413 is an apocalyptic number.

It is an amenable number.

667222278413 is a deficient number, since it is larger than the sum of its proper divisors (1).

667222278413 is an equidigital number, since it uses as much as digits as its factorization.

667222278413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 50.

The spelling of 667222278413 in words is "six hundred sixty-seven billion, two hundred twenty-two million, two hundred seventy-eight thousand, four hundred thirteen".